People engaged in sheet metal bending may be familiar with the issue of workpiece indentations during bending, which can often affect the appearance and quality of the final product. Currently, there are various types of bending machine dies available on the market, such as L-type, R-type bends, with upper dies featuring different angles like 88°, 45°, and lower dies with sharp angles or flattening capabilities. There are also more complex combination dies for multi-angle bending, which require high precision.
The diverse types of bending machine dies pose a challenge to die design, and the cause of indentations may often be attributed to insufficient consideration during the design phase. For instance, the relationship between sheet thickness and bending force is not easily calculable. So, what are the reasons for indentations in bending dies?
Causes and Prevention Suggestions:
1. Unreasonable die design: As mentioned earlier, die compatibility with the current sheet thickness should be considered during design. It is recommended to design dies initially to accommodate various sheet thicknesses, which can reduce processing costs and time.
2. Uneven thickness of different parts of the bending die is also a crucial factor. While new dies are less likely to have this issue, prolonged use can lead to wear and uneven thickness. It is advisable to constantly monitor the die's condition and regrind it when signs of wear are noticed.
3. The bending machine die may not be suitable for the specific product. As mentioned earlier, sheet thickness plays a role, but the material of the workpiece or the required bending angles can also have an impact. In essence, it may not be suitable for the particular product. In such cases, it is recommended to recalculate the bending die angles and required bending force, continually striving to achieve optimal conditions before use.
4. Quality issues with the bending machine die itself, which are more likely to occur with poor quality control in die production. This could be due to inadequate hardness, mismatched angles between upper and lower dies, among other factors. In such situations, strict monitoring of the die manufacturing and processing processes is advised.
These are some of the most common scenarios, and while there are other factors that can lead to indentations, strict quality control in die production, thorough consideration during die design, and continuous attention to die quality generally help effectively prevent indentation issues in bending machine dies.
The diverse types of bending machine dies pose a challenge to die design, and the cause of indentations may often be attributed to insufficient consideration during the design phase. For instance, the relationship between sheet thickness and bending force is not easily calculable. So, what are the reasons for indentations in bending dies?
Causes and Prevention Suggestions:
1. Unreasonable die design: As mentioned earlier, die compatibility with the current sheet thickness should be considered during design. It is recommended to design dies initially to accommodate various sheet thicknesses, which can reduce processing costs and time.
2. Uneven thickness of different parts of the bending die is also a crucial factor. While new dies are less likely to have this issue, prolonged use can lead to wear and uneven thickness. It is advisable to constantly monitor the die's condition and regrind it when signs of wear are noticed.
3. The bending machine die may not be suitable for the specific product. As mentioned earlier, sheet thickness plays a role, but the material of the workpiece or the required bending angles can also have an impact. In essence, it may not be suitable for the particular product. In such cases, it is recommended to recalculate the bending die angles and required bending force, continually striving to achieve optimal conditions before use.
4. Quality issues with the bending machine die itself, which are more likely to occur with poor quality control in die production. This could be due to inadequate hardness, mismatched angles between upper and lower dies, among other factors. In such situations, strict monitoring of the die manufacturing and processing processes is advised.
These are some of the most common scenarios, and while there are other factors that can lead to indentations, strict quality control in die production, thorough consideration during die design, and continuous attention to die quality generally help effectively prevent indentation issues in bending machine dies.
